U.N. chief meets Ukrainian President Zelenskyy, Turkish President Erdogan
United Nations Secretary General Antonio Guterres is in Ukraine today to meet with President Volodymyr Zelenskyy and Turkish President Recep Tayyip Erdogan today to discuss ongoing grain shipments and a dire situation unfolding at a nuclear power plant. CBS News senior foreign correspondent Charlie D'Agata joins "CBS News Mornings" with details.